LU-9558 llite: handle struct vm_operations changes

LU-9558 llite: handle struct vm_operations changes

For the linux 4.11 kernel passing in struct vm_area_struct
to struct vm_operations members has been removed since
struct vm_area_struct has been merged into struct vm_fault.
Handle these changes in the llite layer.

Linux-commit: 11bac80004499ea59f361ef2a5516c84b6eab675

Test-Parameters: trivial

Lustre-commit: a1fc8dffef216b71cb4a29a5a8faa2aa7919d2ae
Lustre-change: https://review.whamcloud.com/27651

Change-Id: I3f8767f02695515d83c59a61f6e9921b3d823109
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Reviewed-on: https://review.whamcloud.com/28573
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>